The Agilent G1312A Binary Pump has 4 solvent inlets and built in gradient control.?It also can be remotely controlled by an external G1323 controller. Setable flow range:Setpoints 0.001 5 ml/min, in 0.001 ml/min increments??, with a flow range of 0.1 5.0 ml/min?. Delay volume 180 - 480 uL without mixer, 600 - 900 uL with mixer. All of our equipment will be fully tested to perform at factory specifications before being shipped.Includes: > Power Cord > 90 day warranty